PoE Controllers Bring More Power and Integration
Oct 1, 2008
Power-over-Ethernet (PoE) technology talk, mainly controller ICs and midspans, has given way to development and production of actual PoE-enabled products...
Improving High-Side Current Measurements
Aug 1, 2008
An IC that combines a high-side current-sense amplifier with an analog voltage multiplier can easily measure the power dissipated in a load...
Controller+MOSFET Equals Smaller ORing Solutions
Aug 1, 2008
The use of Schottky diodes to connect redundant power supplies in parallel for load sharing offers a simple means of protecting the system against a power-supply failure...
Control Hot-Swapping on Negative-Voltage Supplies
Jul 1, 2008
Positive-voltage controllers can be configured for hot-swapping either dual positive and negative supplies, or a single negative supply...
Extend Ratings of One-Wire Switches
Jun 1, 2008
One-wire switches such as the DS2405 from Maxim Integrated Products allow designers to control remote loads through the versatile one-wire network. The...
Resonant Power Supply Suits Audio Systems
Jun 1, 2008
Audio equipment manufacturers are under growing market and commercial pressures to improve the efficiency and no-load power dissipation in products...
Extend Range of Current-Sense Amplifiers
May 1, 2008
One of several limits found is the maximum allowed voltage difference between the current-sense resistor and ground for the data-acquisition circuits...
Feedback Circuit Improves Hysteretic Control
Mar 1, 2008
The hysteretic power supply is simpler than the voltage- or current-mode closed-loop-control dc-dc switchers, although its simplicity may be a bit deceiving...
Psi or Theta: Which One Should You Choose?
Mar 1, 2008
Over the years, standards organizations have undertaken numerous efforts to standardize the test methods that are used to characterize the thermal performance...
Bridgeless PFC Boosts Low-Line Efficiency
Feb 1, 2008
Wide input-voltage range power factor correction (PFC) converters present some of the most difficult component challenges in ac-dc power electronics....
Power Limits Make Hot Swapping More Robust
Jan 1, 2008
You need more than just current limiting to ensure that the hot-swap FET stays within its safe operating area under all operating conditions....
